aboutsummaryrefslogtreecommitdiff
path: root/mm/compaction.c
diff options
context:
space:
mode:
authorThierry Reding <thierry.reding@avionic-design.de>2012-12-12 13:51:17 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-12 17:38:32 -0800
commitc8bf2d8ba4fbc093de7c0d192fe5d2531f14b8b9 (patch)
tree0b26144dd758cc6cdceee1b1d2972bfab76b094c /mm/compaction.c
parent3ea41e6210fea3b234b6cb3e9443e75975850bbf (diff)
downloadlinux-c8bf2d8ba4fbc093de7c0d192fe5d2531f14b8b9.tar.gz
mm: compaction: Fix compiler warning
compact_capture_page() is only used if compaction is enabled so it should be moved into the corresponding #ifdef. Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de> Acked-by: Mel Gorman <mgorman@suse.de> Cc: Rik van Riel <riel@redhat.com> Cc: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/compaction.c')
-rw-r--r--mm/compaction.c108
1 files changed, 54 insertions, 54 deletions
diff --git a/mm/compaction.c b/mm/compaction.c
index d24dd2d7bad..12979121822 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -215,60 +215,6 @@ static bool suitable_migration_target(struct page *page)
return false;
}
-static void compact_capture_page(struct compact_control *cc)
-{
- unsigned long flags;
- int mtype, mtype_low, mtype_high;
-
- if (!cc->page || *cc->page)
- return;
-
- /*
- * For MIGRATE_MOVABLE allocations we capture a suitable page ASAP
- * regardless of the migratetype of the freelist is is captured from.
- * This is fine because the order for a high-order MIGRATE_MOVABLE
- * allocation is typically at least a pageblock size and overall
- * fragmentation is not impaired. Other allocation types must
- * capture pages from their own migratelist because otherwise they
- * could pollute other pageblocks like MIGRATE_MOVABLE with
- * difficult to move pages and making fragmentation worse overall.
- */
- if (cc->migratetype == MIGRATE_MOVABLE) {
- mtype_low = 0;
- mtype_high = MIGRATE_PCPTYPES;
- } else {
- mtype_low = cc->migratetype;
- mtype_high = cc->migratetype + 1;
- }
-
- /* Speculatively examine the free lists without zone lock */
- for (mtype = mtype_low; mtype < mtype_high; mtype++) {
- int order;
- for (order = cc->order; order < MAX_ORDER; order++) {
- struct page *page;
- struct free_area *area;
- area = &(cc->zone->free_area[order]);
- if (list_empty(&area->free_list[mtype]))
- continue;
-
- /* Take the lock and attempt capture of the page */
- if (!compact_trylock_irqsave(&cc->zone->lock, &flags, cc))
- return;
- if (!list_empty(&area->free_list[mtype])) {
- page = list_entry(area->free_list[mtype].next,
- struct page, lru);
- if (capture_free_page(page, cc->order, mtype)) {
- spin_unlock_irqrestore(&cc->zone->lock,
- flags);
- *cc->page = page;
- return;
- }
- }
- spin_unlock_irqrestore(&cc->zone->lock, flags);
- }
- }
-}
-
/*
* Isolate free pages onto a private freelist. Caller must hold zone->lock.
* If @strict is true, will abort returning 0 on any invalid PFNs or non-free
@@ -953,6 +899,60 @@ unsigned long compaction_suitable(struct zone *zone, int order)
return COMPACT_CONTINUE;
}
+static void compact_capture_page(struct compact_control *cc)
+{
+ unsigned long flags;
+ int mtype, mtype_low, mtype_high;
+
+ if (!cc->page || *cc->page)
+ return;
+
+ /*
+ * For MIGRATE_MOVABLE allocations we capture a suitable page ASAP
+ * regardless of the migratetype of the freelist is is captured from.
+ * This is fine because the order for a high-order MIGRATE_MOVABLE
+ * allocation is typically at least a pageblock size and overall
+ * fragmentation is not impaired. Other allocation types must
+ * capture pages from their own migratelist because otherwise they
+ * could pollute other pageblocks like MIGRATE_MOVABLE with
+ * difficult to move pages and making fragmentation worse overall.
+ */
+ if (cc->migratetype == MIGRATE_MOVABLE) {
+ mtype_low = 0;
+ mtype_high = MIGRATE_PCPTYPES;
+ } else {
+ mtype_low = cc->migratetype;
+ mtype_high = cc->migratetype + 1;
+ }
+
+ /* Speculatively examine the free lists without zone lock */
+ for (mtype = mtype_low; mtype < mtype_high; mtype++) {
+ int order;
+ for (order = cc->order; order < MAX_ORDER; order++) {
+ struct page *page;
+ struct free_area *area;
+ area = &(cc->zone->free_area[order]);
+ if (list_empty(&area->free_list[mtype]))
+ continue;
+
+ /* Take the lock and attempt capture of the page */
+ if (!compact_trylock_irqsave(&cc->zone->lock, &flags, cc))
+ return;
+ if (!list_empty(&area->free_list[mtype])) {
+ page = list_entry(area->free_list[mtype].next,
+ struct page, lru);
+ if (capture_free_page(page, cc->order, mtype)) {
+ spin_unlock_irqrestore(&cc->zone->lock,
+ flags);
+ *cc->page = page;
+ return;
+ }
+ }
+ spin_unlock_irqrestore(&cc->zone->lock, flags);
+ }
+ }
+}
+
static int compact_zone(struct zone *zone, struct compact_control *cc)
{
int ret;